AVSPARE.COM
parts catalog

273-5041 SENSOR GP-SPEED S/N 5XD1-4710 FIELD REPLACEMENT FOR @@@@@129-6628@@@@@ FOR USE WITH FIELD REPLACEMENT OF 129-6628 ON THE FOLLOWING ENGINES ONLY, 3508, 3512, 3508B, 3512B, 3516B, & 3524B FIELD INSTALLATION D9N




ELECTRICAL AND STARTING SYSTEM

SENSOR GP
 

#SEBP43860130
 

273-5041: SENSOR GP-SPEED

273-5041 SENSOR GP-SPEED
S/N 5XD1-4710
FIELD REPLACEMENT FOR @@@@@129-6628@@@@@
FOR USE WITH FIELD REPLACEMENT OF 129-6628 ON THE FOLLOWING ENGINES ONLY, 3508, 3512, 3508B, 3512B, 3516B, & 3524B
FIELD INSTALLATION
i02462186 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 522-1643 [1] SENSOR GP-SPEED  
  155-2260 [1] KIT-CONNECTING PLUG (3-PIN)  
    (INCLUDES PLUG AS, WEDGE, & INTERFACE SEAL)
  194-5226 [3] WIRE AS (16-GA)  
    -OR-
  194-5227 [3] WIRE AS (14-GA)  
  117-8766 [1] SEAL-O-RING  
  133-1207 [1] WASHER (21.1X28.1X0.9-MM THK)  
 

#SEBP43860131
 

102-2240: SENSOR GP-TEMPERATURE

102-2240 SENSOR GP-TEMPERATURE -ENGINE COOLANT
S/N 5XD4527-UP
PART OF 285-7342 LINES GP-WATER
i01966291 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 9X-1813 E SLEEVE (34-CM)  
2. 102-8803 [1] KIT-RECEPTACLE (3-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
3. 8T-8729 [3] PIN-CONNECTOR (16-GA TO 18-GA)  
  E   ORDER BY THE CENTIMETER
 

#SEBP43860132
 

106-0735: SENSOR GP-TEMPERATURE

106-0735 SENSOR GP-TEMPERATURE
S/N 5XD1-UP
PROVIDES SENSORS FOR MONITORING MARINE TRANSMISSION OIL TEMP AND PRESSURE, 3 PIN ACTIVE
PART OF 126-7292 PUMP & MTG GP-UNIT INJ HYD
i00089839 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 9X-1813 E SLEEVE (34-CM)  
2. 102-8803 [1] KIT-RECEPTACLE (3-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
3. 186-3735 [3] PIN-CONNECTOR (16-GA TO 18-GA)  
4. 3E-3371 [1] WEDGE-RECEPTACLE LOCK (3-PIN)  
  E   ORDER BY THE CENTIMETER
 

#SEBP43860133
 

338-3456: STARTING MOTOR GP-ELECTRIC

338-3456 STARTING MOTOR GP-ELECTRIC -COLD WEATHER
S/N 1JD1-UP
24-VOLT
PART OF 7N-7049 STARTING MOTOR GP-ELECTRIC
FIELD REPLACEMENT FOR @@@@@ 6V-0513@@@@@
i04199029 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7M-0326 [1] CONNECTOR  
2. 9H-3757 [2] WASHER (0.516X1X0.094-IN THK)  
3. 1S-7446 [3] SCREW-MACHINE (8-32X0.437-IN)  
4. 8C-9660 [3] WASHER (4.6X7.9X0.8-MM THK)  
5. 9S-2544 [9] SCREW-HEX HEAD (8-32X11.13-MM)  
6. 7M-0327 [1] WASHER-THRUST (17.4X25.4X1.6-MM THK)  
7. 3T-3418 [1] FRAME AS-END  
  3T-3423 [1] CUP  
  3T-3424 [1] PLUG-FELT  
  9G-4101 [1] BUSHING-END  
8. 3T-9525 Y [1] PLATE AS-BRUSH (STARTING MOTOR)  
9. 1T-0808 [2] WASHER (0.516X0.812X0.09-IN THK)  
10. 3T-3422 [1] WIRE AS  
11. 2J-8163 [2] SEAL-O-RING  
12. 7X-3373 [1] BOLT (5/16-18X0.88-IN)  
13. 3T-3434 [6] PLUG  
14. 5J-5314 [5] BOLT (5/16-18X1.5-IN)  
15. 3L-3380 [1] BUSHING-TERMINAL  
16. 8C-3089 [1] SEAL-O-RING  
17. 4M-1853 [1] LEVER AS-SHIFT  
18. 5M-3034 [1] LOCKNUT (5/16-24-THD)  
19. 7L-2894 [4] GASKET  
20. 4M-1831 [4] PLUG-LEVER HOUSING  
21. 4M-1854 [1] SHAFT-LEVER  
22. 1H-1023 [1] SEAL-O-RING  
23. 2D-6392 [1] SEAL-O-RING  
24. 551-2216 [1] HOUSING AS-DRIVE  
25. 6N-3826 [1] DRIVE AS-MOTOR  
26. 2H-3429 [2] RING-RETAINING  
27. 6V-1322 [4] BOLT (1/4-20X0.375-IN)  
28. 8T-4205 [4] WASHER-HARD (7.2X14.5X2-MM THK)  
29. 6N-3279 [1] INSULATOR  
30. 0S-1597 [13] BOLT (1/4-28X1-IN)  
31. 1M-9971 [1] SPACER (0.835X1.72X0.188-IN THK)  
32. 1H-2629 [3] STRIP-INSULATION  
33. 7M-0324 [1] COIL AS-FIELD  
34. 3R-8797 [12] SCREW & WASHER AS (3/8-24X0.72-IN)  
35. 7F-3488 [6] SHOE-POLE  
36. 7M-8651 [1] ARMATURE AS  
37. 7M-0325 [1] INSULATOR  
38. 3T-9524 [6] BRUSH AS  
39. 3N-3763 [1] KIT-TERMINAL (STARTING MOTOR)  
    (INCLUDES BUSHINGS & WASHERS)
40. 338-3453 [1] SOLENOID AS-STARTING MOTOR (24-VOLT)  
  3R-8801 [1] CLAMP  
41. 3R-8801 [1] CLAMP  
42. 8F-1434 [2] LOCKWASHER  
43. 6V-8188 [6] NUT (1/2-13-THD)  
44. 7X-0562 [6] WASHER-HARD (13.5X19X0.8-MM THK)  
45. 4B-2049 [6] NUT (10-32-THD)  
46. 8T-0328 [10] WASHER-HARD (5.5X10X1-MM THK)  
47. 3T-9494 [6] SPRING  
48. 3E-7771 [1] HOUSING AS (STARTING MOTOR)  
49. 9G-4101 [1] BUSHING-END  
50. 3T-3424 [3] PLUG-FELT  
51. 3T-3423 [3] CUP  
52. 1M-9968 [1] BUSHING  
53. 2F-6678 [1] SEAL-LIP TYPE  
54. 4L-2729 [1] WASHER (0.844X1.9X0.188-IN THK)  
55. 4M-1896 [1] BUSHING-TERMINAL  
56. 045-4065 [4] SCREW-MACHINE (10-32X0.75-IN)  
57. 125-6535 [1] COVER-STARTING MOTOR  
58. 351-8955 [1] SEAL-O-RING  
  Y   SEPARATE ILLUSTRATION
 

#SEBP43860134
 

6V-0513: STARTING MOTOR GP-ELECTRIC

6V-0513 STARTING MOTOR GP-ELECTRIC
S/N 1JD1-UP
24 VOLT
PART OF 7N-7049 STARTING MOTOR GP-ELECTRIC
FIELD REPLACEMENT ORDER @@@@@338-3456@@@@@
i02305147 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 0S-1597 [13] BOLT (1/4-28X1-IN)  
2. 3L-3380 [1] BUSHING-TERMINAL  
3. 3T-3418 [1] FRAME AS-END  
4. 3T-3423 [1] CUP  
5. 9G-4101 [1] BUSHING-END  
6. 3T-3424 [1] PLUG-FELT  
7. 7M-0327 [1] WASHER-THRUST (17.4X25.4X1.6-MM THK)  
8. 7M-8651 [1] ARMATURE AS  
9. 7M-0324 [1] COIL AS-FIELD  
10. 9H-3757 [2] WASHER (0.516X1X0.094-IN THK)  
11. 7X-0562 [6] WASHER-HARD (13.5X19X0.8-MM THK)  
12. 6V-8188 [6] NUT (1/2-13-THD)  
13. 7M-0326 [1] CONNECTOR  
14. 8T-4205 [4] WASHER-HARD (7.2X14.5X2-MM THK)  
15. 338-3453 C [1] SOLENOID AS-STARTING MOTOR (24-VOLT)  
  3R-8801 [1] CLAMP  
16. 6V-1322 [4] BOLT (1/4-20X0.375-IN)  
17. 4M-1831 [4] PLUG-LEVER HOUSING  
18. 7L-2894 [4] GASKET  
19. 3R-8797 [12] SCREW & WASHER AS (3/8-24X0.72-IN)  
20. 7M-0325 [1] INSULATOR  
21. 7F-3488 [6] SHOE-POLE  
22. 1S-7446 [3] SCREW-MACHINE (8-32X0.437-IN)  
23. 3T-9524 [6] BRUSH AS (STARTING MOTOR)  
24. 9S-2544 [9] SCREW-HEX HEAD (8-32X11.13-MM)  
25. 3T-9525 Y [1] PLATE AS-BRUSH (STARTING MOTOR)  
35. 2D-6392 [1] SEAL-O-RING  
36. 2J-8163 [2] SEAL-O-RING  
37. 1T-0808 [2] WASHER (0.516X0.812X0.09-IN THK)  
38. 3R-8801 [1] CLAMP  
39. 6N-3826 [1] DRIVE AS-MOTOR  
40. 1H-2629 [3] STRIP-INSULATION  
41. 3T-3422 [1] WIRE AS  
43. 036-9821 [1] WASHER  
44. 306-3998 [1] BOOT-RUBBER  
45. 4M-1828 [1] RETAINER-SPRING  
46. 9M-7609 [1] SPRING (SHIFT LEVER)  
47. 1H-1023 [1] SEAL-O-RING  
48. 3E-7771 [1] HOUSING AS (STARTING MOTOR)  
49. 3T-3424 [2] PLUG-FELT  
50. 3T-3423 [2] CUP  
51. 1M-9968 [1] BUSHING  
52. 2F-6678 [1] SEAL-LIP TYPE  
53. 4L-2729 [1] WASHER (0.844X1.9X0.188-IN THK)  
54. 4M-1854 [1] SHAFT-LEVER  
55. 2H-3429 [2] RING-RETAINING  
56. 4M-1853 [1] LEVER AS-SHIFT  
57. 5M-3034 [1] LOCKNUT (5/16-24-THD)  
58. 1M-9971 [1] SPACER (0.835X1.72X0.188-IN THK)  
59. 4M-1827 [1] RETAINER-SPRING  
60. 8C-3089 [1] SEAL-O-RING  
61. 3E-7768 [1] HOUSING AS  
62. 4M-1896 [1] BUSHING-TERMINAL  
63. 8C-9660 [3] WASHER (4.6X7.9X0.8-MM THK)  
64. 3T-9494 [6] SPRING (STARTING MOTOR)  
65. 5J-5314 [5] BOLT (5/16-18X1.5-IN)  
66. 3N-3763 [1] KIT-TERMINAL (STARTING MOTOR)  
    (INCLUDES WASHER & BUSHINGS)
70. 7X-3373 [1] BOLT (5/16-18X0.88-IN)  
71. 6N-3279 [1] INSULATOR  
72. 4B-2049 [6] NUT (10-32-THD)  
73. 8T-0328 [10] WASHER-HARD (5.5X10X1-MM THK)  
74. 8F-1434 [2] LOCKWASHER  
75. 3T-3434 B [6] PLUG  
76. 7T-9123 [1] GASKET-PLATE  
77. 045-4065 [4] SCREW-MACHINE (10-32X0.75-IN)  
78. 125-6535 [1] COVER-STARTING MOTOR  
79. 125-6536 [1] TERMINAL AS  
    PARTS SHOWN IN GRAPHIC(S) WITHOUT A REFERENCE NUMBER ARE NOT SERVICED SEPARATELY
  B   USE AS REQUIRED
  C   CHANGE FROM PREVIOUS TYPE
  Y   SEPARATE ILLUSTRATION
 

#SEBP43860135
 

7N-7049: STARTING MOTOR GP-ELECTRIC

7N-7049 STARTING MOTOR GP-ELECTRIC
S/N 1JD1-UP
24-VOLT
PART OF 281-0354 CONVERSION GP-ELECTRICAL
Type 1
i00410541 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5R-7755 [1] WIRE AS  
2. 7N-6494 [1] GASKET  
3. 6V-0513 CY [1] STARTING MOTOR GP-ELECTRIC  
4. 8S-2332 [3] BOLT-12 POINT HEAD (5/8-11X1.75-IN)  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMANUFACTURED PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP43860136
 

7N-7049: STARTING MOTOR GP-ELECTRIC

7N-7049 STARTING MOTOR GP-ELECTRIC
S/N 1JD1-UP
24-VOLT
PART OF 281-0354 CONVERSION GP-ELECTRICAL, 454-8421 KIT-ENGINE CONVERSION
Type 2
i04317500 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 5R-7755 [1] WIRE AS  
2. 7N-6494 [1] GASKET  
3. 338-3456 CY [1] STARTING MOTOR GP-ELECTRIC  
4. 8S-2332 [3] BOLT-12 POINT HEAD (5/8-11X1.75-IN)  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMANUFACTURED PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP43860137
 

7N-7049: STARTING MOTOR GP-ELECTRIC

7N-7049 STARTING MOTOR GP-ELECTRIC
S/N 1JD1-UP
24-VOLT
PART OF 281-0354 CONVERSION GP-ELECTRICAL, 454-8421 KIT-ENGINE CONVERSION
Type 3
i06989387 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 7N-6494 [1] GASKET  
2. 338-3456 Y [1] STARTING MOTOR GP-ELECTRIC  
3. 397-3989 C [1] WIRE AS-GROUND  
4. 8S-2332 [3] BOLT-12 POINT HEAD (5/8-11X1.75-IN)  
  C   CHANGE FROM PREVIOUS TYPE
  R   REMANUFACTURED PART MAY BE AVAILABLE
  Y   SEPARATE ILLUSTRATION
 

#SEBP43860138
 

100-4417: SWITCH GP-FLOW

100-4417 SWITCH GP-FLOW
S/N 5XD1-UP
i00089826 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 171-8708 [1] SWITCH GP-FLOW (ENGINE COOLANT)  
  102-8802 [1] KIT-RECEPTACLE (2-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
  9X-1813 E SLEEVE (22-CM)  
2. 2B-2695 [2] BOLT (5/16-18X0.875-IN)  
3. 9M-1974 [2] WASHER-HARD (8.8X16X2-MM THK)  
4. 4N-3841 [1] GASKET  
  E   ORDER BY THE CENTIMETER
 

#SEBP43860139
 

163-5809: WIRING GP-ENGINE

163-5809 WIRING GP-ENGINE
S/N 5XD1-UP
i01296110 SEBP4386
  For full view, you need register

Parts for your D9N TRACK-TYPE TRACTOR:

CATERPILLAR SIS
Pos. Part No Qty Parts name Comments
1. 121-0596 [1] HARNESS AS-WIRING  
  123-1199 [1] SEAL-CONNECTOR  
  123-1200 [1] SEAL-CABLE (CABLE)  
  102-8802 [1] KIT-RECEPTACLE (2-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
2. 163-8415 [1] HARNESS AS-WIRING  
  102-8812 [3] SEAL  
  155-2270 [3] KIT-CONNECTING PLUG (2-PIN)  
    (EACH INCLUDES PLUG AS & WEDGE)
  102-8802 [1] KIT-RECEPTACLE (2-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
  102-8803 [6] KIT-RECEPTACLE (3-PIN)  
    (EACH INCLUDES RECEPTACLE AS & WEDGE)
  102-8814 [4] SEAL  
  155-2271 [4] KIT-CONNECTING PLUG (4-PIN)  
    (EACH INCLUDES PLUG AS & WEDGE)
  102-8804 [1] KIT-RECEPTACLE (4-PIN)  
    (INCLUDES RECEPTACLE AS & WEDGE)
  155-2260 [4] KIT-CONNECTING PLUG (3-PIN)  
    (EACH INCLUDES PLUG AS & WEDGE)
3. 171-6769 [1] BRACKET  
4. 194-2885 [1] BRACKET AS  
  7T-1099 [2] LINK  
5. 194-6591 [1] BRACKET AS  
  7T-1099 [1] LINK  
6. 7K-1181 B [25] STRAP-CABLE  
7. 091-0081 [1] SPACER (10.5X20X10-MM THK)  
8. 0S-0509 [1] BOLT (3/8-16X0.75-IN)  
9. 132-5789 [1] CLIP (LADDER)  
10. 3B-1915 [1] BOLT (3/8-16X1.375-IN)  
11. 4B-5324 [4] WASHER (3.9X9.6X1.2-MM THK)  
12. 4D-7735 [1] CLIP  
13. 4P-7581 [8] CLIP (LADDER)  
14. 4P-8134 [2] CLIP (LADDER)  
15. 4S-1962 [1] CLIP (LOOP)  
16. 8T-4896 [1] WASHER-HARD (10.2X18.5X2.5-MM THK)  
17. 9S-8752 [1] NUT-FULL (3/8-16-THD)  
18. 9X-6258 [4] SCREW-MACHINE (6-32X0.5-IN)  
19. 9X-6458 [2] WASHER-HARD (10.2X22.5X3-MM THK)  
  B   USE AS REQUIRED
 

Information:

Special Instruction
Retrofit Installation of Coolant Loss Sensor{1353, 1395, 7422, 7470}
Retrofit Installation of Coolant Loss Sensor{1353, 1395, 7422, 7470}
Selecting Correct Part Numbers For Sensors and Adapter Harnesses for Certain Machines and Engines{1408, 1439}
Selecting Correct Part Numbers For Sensors and Adapter Harnesses for Certain Machines and Engines{1408, 1439}
Procedure to Test the Position Sensor of a Hydraulic Cylinder {1439, 7562}
Procedure to Test the Position Sensor of a Hydraulic Cylinder {1439, 7562}
Specifications
Magnetic Pickup
3408 ENGINE FOR CATERPILLAR BUILT MACHINES
Engine Oil Pressure Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Engine Oil Pressure Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Coolant Temperature Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Inlet Air Temperature Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Speed/Timing Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Fuel Temperature Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Turbocharger Outlet Pressure Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Injection Actuation Pressure Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Atmospheric Pressure Sensor
3408E and 3412E Engines for Caterpillar Built Machines
Magnetic Pickup
3408E and 3412E Engines for Caterpillar Built Machines
Magnetic Pickup
3408E and 3412E Engines for Caterpillar Built Machines
Tool Operating Manual
Using the 265-4177, 265-4209 Service Tool Groups to Install Sensors in Position-Sensing Hydraulic Cylinders{0599, 0709, 0738, 1439, 7562, 7562}
Using the 265-4177, 265-4209 Service Tool Groups to Install Sensors in Position-Sensing Hydraulic Cylinders{0599, 0709, 0738, 1439, 7562, 7562}
Using the 453-3204 Pressure and Temperature Test Group{0374, 0599, 0706, 0708, 0709, 0731, 0732, 0738, 1408, 1439}
Using the 453-3204 Pressure and Temperature Test Group{0374, 0599, 0706, 0708, 0709, 0731, 0732, 0738, 1408, 1439}
Reuse And Salvage Guidelines
Reuse Guideline for Hydraulic Cylinder Position Sensor {5574, 5736}
Reuse Guideline for Hydraulic Cylinder Position Sensor {5574, 5736}
Troubleshooting
MID 122 - CID 0269 - FMI 03
Product Link 121S/300
MID 122 - CID 0269 - FMI 04
Product Link 121S/300
Disassembly and Assembly
Turbocharger Outlet Pressure Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Injection Actuation Pressure Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Speed/Timing Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Coolant Temperature Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Engine Oil Pressure Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Fuel Temperature Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Engine Oil Temperature Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Atmospheric Pressure Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Inlet Air Temperature Sensor - Remove and Install
3408E and 3412E Engines for Caterpillar Built Machines
Service Magazine

Caterpillar Parts SIS Catalog D9N :

Truck sale:

149,444 USD 
Caterpillar D9N, Construction
- Dozers
FINNING CANADA
Canada
59,900 
Caterpillar D9N, Construction
- Dozers
N C MACHINERY CO.
 
CATERPILLAR D9N 1990
- TRACK TYPE TRACTORS
LOUISIANA CAT
Louisiana United States
 
CATERPILLAR D9N 1992
- TRACK TYPE TRACTORS
TRACTORS INDIA PVT LIMITED [TIPL]
 
CATERPILLAR D9N 1989
- TRACK TYPE TRACTORS
WAGNER EQUIPMENT CO
United States
Back to top
The names Cat, Caterpillar, John Deere, Komatsu, Volvo, Hitachi, Doosan, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
AVSpare.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only. Cat® and Caterpillar® are registered trademarks of Caterpillar, Inc.